Kyoto was the capital until 1869; Edo was the capital until 1868.
Boundaries: Natural Earth (naturalearthdata.com), public domain
| Aichi-ken | Nagoya | 7.6 M · 45 districts |
| Akita | Akita | 960 k · 19 districts |
| Aomori-ken | Aomori | 1.2 M · 18 districts |
| Chiba-ken | Chiba | 6.3 M · 43 districts |
| Ehime | Matsuyama | 1.3 M · 18 districts |
| Fukui | Fukui-shi | 779 k · 17 districts |
| Fukuoka Prefecture | Fukuoka | 5.1 M · 40 districts |
| Fukushima-ken | Fukushima | 1.8 M · 26 districts · seat ≠ largest |
| Gifu | Gifu | 2.0 M · 31 districts |
| Gunma-ken | Maebashi | 1.9 M · 19 districts · seat ≠ largest |
| Hiroshima-ken | Hiroshima | 2.8 M · 19 districts |
| Hokkaido | Sapporo | 5.1 M · 100 districts |
| Hyōgo | Kobe | 5.5 M · 37 districts |
| Ibaraki | Mito | 2.9 M · 39 districts |
| Ishikawa-ken | Kanazawa | 1.1 M · 16 districts |
| Iwate | Morioka | 1.2 M · 24 districts |
| Kagawa-ken | Takamatsu | 949 k · 13 districts |
| Kagoshima-ken | Kagoshima | 1.6 M · 27 districts |
| Kanagawa | Yokohama | 9.1 M · 26 districts |
| Kochi Prefecture | Kochi | 758 k · 17 districts |
| Kumamoto | Kumamoto | 1.7 M · 23 districts |
| Kyoto Prefecture | Kyoto | 2.6 M · 21 districts |
| Mie-ken | Tsu | 1.8 M · 21 districts · seat ≠ largest |
| Miyagi-ken | Sendai | 2.3 M · 24 districts |
| Miyazaki | Miyazaki | 1.1 M · 15 districts |
| Nagano-ken | Nagano | 2.1 M · 33 districts |
| Nagasaki Prefecture | Nagasaki | 1.3 M · 18 districts |
| Nara-ken | Nara-shi | 1.3 M · 19 districts |
| Niigata-ken | Niigata | 2.1 M · 29 districts |
| Oita Prefecture | Ōita | 1.1 M · 17 districts |
| Okayama-ken | Okayama | 1.9 M · 26 districts |
| Okinawa | Naha | 1.5 M · 16 districts |
| Ōsaka-fu | Osaka | 8.8 M · 38 districts |
| Saga-ken | Saga | 809 k · 17 districts |
| Saitama-ken | Saitama | 7.3 M · 49 districts |
| Shiga | Ōtsu | 1.4 M · 17 districts |
| Shimane-ken | Matsue | 665 k · 13 districts |
| Shizuoka | Shizuoka | 3.6 M · 28 districts · seat ≠ largest |
| Tochigi | Utsunomiya | 1.9 M · 19 districts |
| Tokushima-ken | Tokushima | 729 k · 16 districts |
| Tokyo Prefecture | Tokyo | 14.2 M · 54 districts |
| Tottori | Tottori-shi | 571 k · 9 districts |
| Toyama-ken | Toyama | 1.0 M · 12 districts |
| Wakayama | Wakayama | 944 k · 15 districts |
| Yamagata-ken | Yamagata | 1.1 M · 21 districts |
| Yamaguchi | Yamaguchi | 1.4 M · 17 districts |
| Yamanashi | Kofu | 817 k · 18 districts |
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